It all happend the night that Kim Taehyung, the boy who works with Park Jimin the leader of a mafia group, went for a mission at Jeon's mansion. Yes, the Jeon twins that were leaders of the mafia group, Bangtan, the strongest mafia group in Seoul and all around Korea. Taehyung thought that it's going to be easy as always; but sometimes, some little things go wrong in big plans. Therefore, that little mistake changes Taehyung's whole life...